#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>




using namespace std;
#include "string.h"


void string_test1()
{
	bit::string s1("hello world");
	cout << s1.c_str() << endl;


	for (size_t i = 0; i < s1.size(); i++)
	{
		s1[i]++;
	}
	cout << endl;

	for (size_t i = 0; i < s1.size(); i++)
	{
		cout << s1[i] << " ";
	}
	cout << endl;
}

int main()
{

	string_test1();

	return 0;
}